Apparently something happened on the north side of Central. Reports of some damage at the corner of Hooper and Sullivan Rds.
LSR says it was a downburst.
3 SW Greenwell Spring [East Baton Rouge Co, LA] BROADCAST MEDIA reports TSTM WND DMG at 21 Aug, 2:58 PM CDT -- STRONG WINDS ASSOCIATED WITH A DOWNBURST RIPPED OFF PORTIONS OF A ROOF OF A SHOPPING CENTER AT THE CORNER OF HOOPER AND SULLIVAN IN CENTRAL. FIRE DEPARTMENT STATION 31 NEXT DOOR MEASURED A WIND GUST OF 55 MPH. RELAYED VIA SOCIAL MEDIA AND NWSCHAT.
Post by HarahanTim - Now in Covington! on Aug 26, 2019 9:04:18 GMT -6
BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service New Orleans LA 957 AM CDT Mon Aug 26 2019
The National Weather Service in New Orleans has issued a
* Severe Thunderstorm Warning for... West central St. Tammany Parish in southeastern Louisiana... Southeastern Tangipahoa Parish in southeastern Louisiana...
* Until 1030 AM CDT.
* At 956 AM CDT, a severe thunderstorm was located near Madisonville, or 7 miles west of Covington, moving east at 30 mph.
HAZARD...60 mph wind gusts.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include... Covington and Madisonville.
For your protection move to an interior room on the lowest floor of a building.
Large hail and damaging winds and continuous cloud to ground lightning is occurring with this storm. Move indoors immediately. Lightning is one of nature's leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning.
Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways.
Mesoscale Precipitation Discussion 0804 NWS Weather Prediction Center College Park MD 1111 AM EDT Mon Aug 26 2019
Areas affected...Central Gulf Coast including parts of AL, MS, LA
Concerning...Heavy rainfall...Flash flooding possible
Valid 261510Z - 262000Z
Summary...Deep, tropical moisture continues to linger along the central Gulf Coast. Any thunderstorms or rain bands developing in that environment will be capable of producing very heavy rain rates of 2-3 inches per hour, and perhaps locally higher than that. This may lead to some episodes of flash flooding late this morning and into the early-mid afternoon across parts of southern Louisiana, southern Mississippi, and far southern Alabama.
Discussion... A weakly-defined frontal wave or low was noted in near KMEI as of 15Z, with a depth through much of the troposphere per objective RAP analysis. This feature was likely convectively enhanced due to persistent overnight convection over SC MS, and could also be described as a sort of MCV, gradually lifting east-northeast. Several spokes of convection were focused to the west and south of the low, generally in corridors of enhanced low-level convergence. This convection was showing a propensity to backbuild and train, with low-level inflow generally exceeding the deep layer mean wind by 5-10 knots and the strongest instability situated to the west of the Mississippi River and just offshore over the Gulf of Mexico. This sort of configuration favors backbuilding, and that could be expected to continue as long as the instability axis is positioned upstream and low-level inflow remains somewhat strong. RAP forecasts show the 925-850mb winds decreasing around 19-20Z and thus the early afternoon may mark a transition from training and backbuilding bands of convection to more disorganized convection (or perhaps a greater concentration along differential heating and sea breeze boundaries).
Until that time convective bands may produce localized heavy rainfall, with hourly rain rates likely to exceed 2 inches in the strongest convection. 12Z soundings from BMX, JAN, LIX and LCH indicate a deep, tropical moisture plume with PW values approaching 2.5 inches in some areas and a warm cloud depth around 5-6km. This means that thunderstorms and rain bands should be very efficient, with dominant warm rain processes. Not surprisingly MRMS isothermal reflectivity at -15C shows very limited coverage of 35+ dBZ values and the precipitation flag is highlighting a tropical rainfall mode in parts of the I-10 corridor. Cross sections of rain bands generally show a low-echo centroid structure and that is typical of efficient rain bands. Given the potential for continued training and backbuilding in environment that favors efficient rainfall production, flash flooding will be possible into the afternoon hours.
Post by grisairgasm on Aug 26, 2019 13:11:25 GMT -6
Got scary here for a minute with this cell over me. Heavy rain cycling on and off six times in a minute before finally turning into a steady 2 minute downpour. Last time this happened we had a confirmed F0 hit our house. I learned my lesson that rapid cycling can often mean bands of rain around a tight circulation aloft. All good now. Maybe a waterspout if this cell makes it into the lake.
Post by HarahanTim - Now in Covington! on Aug 26, 2019 14:51:14 GMT -6
BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service New Orleans LA 347 PM CDT Mon Aug 26 2019
The National Weather Service in New Orleans has issued a
* Flash Flood Warning for... West central St. Bernard Parish in southeastern Louisiana... Southwestern Orleans Parish in southeastern Louisiana... North central Jefferson Parish in southeastern Louisiana...
* Until 545 PM CDT.
* At 346 PM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Up to three inches of rain have already fallen. Flash flooding is expected to begin shortly.
Additional rainfall amounts of 2 inches are possible in the warned area.
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
Excessive runoff from heavy rainfall will cause flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other drainage areas and low lying spots.
A Flash Flood Warning means that flooding is imminent or occurring. If you are in the warned area move to higher ground immediately. Residents living along streams and creeks should take immediate precautions to protect life and property.